Wrench.



PATENTED AUG. 15, 1905.

WRENGH.

APPLICATION FILED MM! 11. 1905.

fNVE/VTOR TTEU STATES illlltlf l lt tl l l ll llil.

(ll-lit).

WHENEM.

No. romeo.

@pecification of Letters Patent.

Patented Aug. 15, 1905,

Application filed May 11,1905. Serial No. 259,917.

To all whom, 11/; may concern:

Be it known that 1, Roman A. BnooKs, a citizen of the United States,residing at Ashtahula, in the county of Ashtabula and State of Ohio,have invented new and useful Improvements in Wrenches, of which thefollowing is a speciiication.

This invention is a wrench particularly adapted for use as apipe-wrench.

It comprises athreaded handle having arms pivoted to the front endthereof and adjusted and held by means of a chain connected to atraveling nut on the handle. At the end of each arm is a jaw, and thejaws are adjustable to vary their angularity with respect to the arms,and consequently with respect to the piece being acted on.

In the accompanying drawings, Figure 1 is a side view of the wrench.Fig. 2 is an edge view. Fig. 8 is a detail of one 0.1 the jaws removed.Fig. a is a section on the line t a of Fig. 1.

Referring specifically to the drawings, 6 indicates a flattenedhandle-bar threaded, as at 7, for a portion of its length. Pivoted tothe front end of this llandle-bar are two arms 8 and 9, each of which isformed of parallel spaced plates which embrace the end of the bar, wherethey are connected by a pivot bolt The arm 8 has connected thereto onthe inner side one end of a chain 11, which extends thence tl'irough thearm 9, between the plates thereof, and around a roller 12, which isjournaled in the plates of said arm. The other end of the chain isconnected by a bolt 13 to a ring 14:, which is fitted in a groove in anut 15 behind a collar 16 thereon. The nut travels on the threads 7. Atthe front end each arm has a jaw member 17, pivoted by a bolt 18 betweenthe side plates of the arm, and the rear end of the jaw member-has anotched segment 19.

20 is a squared key-piece of metal extending through a mortise in thearm and having ribs 21 arranged to engage in the notches 19. The piece20 is removably held in position by a spring 22, fastened to the side ofthe arm, having a lug Q3 engaging in a depression in the side of saidpiece.

the piece can be pulled out, allowing the jaw member to turn on thepivot 18 to vary its By lifting the Spring.

angularity with respect to the work. The ribs 21, engaging the notches19, prevent turn or slipping ot the jaws when in use.

The arms-are drawn together and the jaws adjusted to the work by meansof the nut 15 and the chain .1 l. When the jaws are placed upon thepiece of work, the nut 15 is backed until the chain is pulled tight,thereby clamping the jaws upon the work. The power can then be appliedand the wrench operated. Release ot' the work is effected by advancingthe nut to loosen the chain.

To prevent the arm 8, to which the chain is attached, from swingingentirely around by reason of the pull of the chain, a block 8 is fixedbetween the side plates forming the arm, and this block has an inclinedface, which stops against the inclined taco 6 at the end 01 the handle6, so that the arm cannot swing beyond a certain position.

The means for adjusting the jaws at diil'er ent angles with respect tothe arms-allows the same to be advantageously set for round, square, orother work, and a wrench having a wide range of utility is produced.

\Vhat 1 claim as new, and desire to secure by Letters Patent, is-

1. A. wrench comprising a handle, arms pivoted thereto, means to drawthe arms together, and jaws pivoted to the arms and adjustable angularlywith respect thereto, and means to hold the jaws at adjustment.

2. A wrench comprising a handle, arms pivoted thereto, means to draw thearms together, jaws pivoted to arms and having notches at the rear ends,and keys between the jaws and arms, having ribs fitting in said notches.

b. A wrench comprising a screw-threaded handle having a traveling nutthereon, a pair of arms having jaws at the ends, pivoted to said handle,and a chain coni'iected at one end to one arm and extei'uling around aroller on the other arm and connected to the nut at the other end.

I n testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

v ltULLllfl A. BROOKS.

'VVitnesses:

it. Penman, l3. A. l.i.-:ALL.

